Craig may have tried to poison everyone against Derek, but I don't think it will work. Firstly, with Mary gone there are less people who like/tolerate Craig - he won't become any more popular in the house than he already was. However, very few people dislike Derek (he only got 2 nominations himself, 1 of whom was someone he nominated too), & those people may well choose Derek over Craig because at least they've got to know him better. Secondly, Craig's on a high from not being the 1st one to be evicted, which is fair enough. However, he'll have to calm down about it today - people certainly won't want to hear the same story over & over again.
If Derek has done wrong & gets pulled up by BB, he'll accept what they say, but if he thinks (or is told) that Craig has been stirring trouble for him, he'll deal with
him. Get the tissues ready...